Locomotive-boiler.



No. 694,786.- Patented Mar. 4, i902.

s. s. BIEGEL' LUGDIIDTIVE BOILER.

(Application filed. Tune $4, 1901.) (No Model.) 2 Sheets-Shea! l.-

WITNESSES: nv VENQTOR m: Mann: ms 00.. PHOTO-LING" wnsumnmm u, a

No, 694,786. Patented Mar. 4, I902.

-8. S. RIEGEL.

LUGOMOTIVE BOILER.

(Application flied June 24, 1901.]

2 Sheets-Sheet 2.

(No Model.)

INVENTAOH WQITNESSES: a 2. 04 15W UNITED STATES.

SAMUEL STEWART RIEGEL,

PATENT OFFICE.

OF DUNKIRK, NEWV YORK.

LOCOMOTlYE-BOILER.

srnor'r'icarlon forming pm of Letters Patent No. 694,786, dated March 4,1902.

Application filed June 24, 1901i Serial N0! 65, 859. (No model.)

T0 o whom it may concern:

Be it known. that I, SAMUEL'STEWART RIE- GEL, a citizen of the UnitedStates, residing in Dunkirk, New. York, have invented certainImprovements in Locomotive-Boilers, of which the following is aspecification.

My invention relates to certain improvements in boilers, particularly ofthe locomotive type, generally known as the wide firebox boilers,though, it will be understood these improvements are not necessarilyre-, stricted in their application to this class of boiler, but may beapplied to all boilers whose fire-boxes are sufliciently large and whichare or may be so constructed as to permit of their application.

The object of my invention is to so con-- struct locomotive-boilers ofthe various types in such a manner that the heating-surface may begreatly increased without the possibility of a corresponding increase inthe dimensions of the boiler and that thereby evaporation is promoted byincreasing the watercirculation where the heat is most intense, thusalso preventing precipitates from forming scale, all of which virtuestend to greater efficiencies and economies in coal consumption and to anincrease in the life of the boiler. These objects I attain in the mannerherein illustrated and described, reference being had to theaccompanying drawings, in which- Figure 1 is an elevation of alocomotive boiler of sufficient detailed construction to illustrate themanner of a general application of my improvements. Fig. 2 is a halfcrosss'ection through the fire-box and a half rear view of the boilershown in Fig. 1. Fig.3 is a longitudinal section through the fire-box ofa boiler, illustrating either of two forms of applications shown alsoincross-sectionsin Figs. 4 and 5. Fig. 4. is a half cross-section and ahalf rear view of a boiler shown in Fig. 3. Fig. 5 is a halfcross-sectionand a half rear view of a boiler shown in Fig. 3, showinganother arrangement. Figs. 4 and 5 show the application of twoarrangements as applied to boiler in Fig. 3. Fig. 6 shows a longitudinalsection throughthe fire-box of another form of boiler, and Fig. 7 is ahalf cross-section and a half rear elevation of Fig. 6. To-

' space'for the combustion of the gases is materially the same, Severalarrangements are shown in the various figures. These diderentarrangements are necessitated by the various types of boilers and bydetailed features of construction. In Figs. 1 and 2 I have shown twonests of tubes arranged right and left, respectively, along the sides,passing from the lower end of the inner side sheetsb to the crown-sheetc, the side sheets 12 being drawn in and the crown-sheet c being dishedto permit the tubes at to be made straight and of uniform length. Itwill be noticed that these tubes 0. are in the'fire-box A in the regionof greatest heat and are entirely surrounded by burning gases. In Fig. 1I have shown also the fines d as universally applied to boilers of thistype to allow the gases to pass to smoke-box in the usual manner. Thecoal, oil, or any fuel desired is burned in the firebox, and theresulting gases surround thev tubes at in the fire-box and are burnedthere, from whence the hot gases pass through the fines d to thesmoke-box and up the stack.

The water enters the lower ends of the wator-tubes a and being heatedrapidly risest'hrough them and passes out at the top, thus producingrapid circulation and increased evaporation. In the arrangement in Figs.3 and 4 the water enters pipes orinlets e and f to drums or cylindersg,placed right and left, respectively, thence it passes up'through thetubes as in the general manner. The inlets are applied in places bestchosen to give most efficient results. In Figs. 5 and 3 the water passesthrough tubes arranged along the length of fire-box, as water grates h,to'a central drum 7' and thence up through tubes a, as before. In Figs.6 and '7 I have shown too the application to a very. wide fire-box, andin Fig. 8 I have it applied to a moderatelywide but somewhat-longerfire-box.

In Figs. (5 and 7 the tubes at enter the lower ends of side sheets andcome out at the crownsheet 0, as before described, and the circulationof the Water is as before; but in this design I have shown a newfeature. The mudring 7c is made double along the sides, as shown in Fig.7, to allow the tubes a to be readily removed and renewed by removingthe plate Z, which is bolted to the under side of mud-ring 70. This alsoallows inspection of the tubes at when desired. The boiler in Fig. 7 hasshown crown-bars m, which can be readily removed when it becomesnecessary to tighten the ends of tubes a in the crownsheet 0, or theymay be dispensed with entirely in many of the existing boiler shapes.

In Fig. 8 I have shown a shape of boiler which to all intents is mostdesirable and makes the most pleasant application. In it the tubes atenter the under side of the side sheets I) and pass through the fire-boxto the crown 0; but the crown-sheet is not dished in this case, andthetubes aare curved at their upper ends to enter the crown in the mostfavorable manner. The tubes 66 are shown straight at their lower endsinthis figure, al though they may also be bent here, so that the sidesheets need not be bent at all or bent but slightly, as is desired. Atn, Fig. 8, is also a removable plate to allow access to the tubes, as inFig. 7. The tubes are expanded at their ends or are fastened in theusual way common to boiler practices.

Arrangements shown in Figs. 1, 2, 6, 7, and 8 are preferably applicableto new boilers only, while arrangements shown in Figs. 3, 4, and 5 areapplicable as well to boilers already in service as to new ones.

I claim as my invention- 1. The combination in a boiler structure of thelocomotive type, of an external shell, a fire-box therein having aportion of its surface inclined, fire-tubes extending between thefire-box and the external shell, and a series of water-tubes on eachside of a vertical plane through the long axis of the boiler, said tubescommunicating with openings in various parts of the surface of thefire-box, said series of tubes being relatively near to one another attheir upper portions and some distance apart at their lowerportions,wherebya space is left for fuel and free combustion ofgases,substantially as described.

2. The combination in a boiler structure of the locomotive type, of afire-box havinga portion of its lower surface inclined, a dishedcrown-sheet to the fire-box and inclined watertubes extending fromopenings in the dished portion of said crown-sheet to openings in theinclined surface of the lower part of the firebox, substantially asdescribed.

3. The combination in a boiler structure of the locomotive type of afire-box having the lower surface of its sides inclined inwardly, withseries of water-tubes extending between the crown-sheet of the fire-boxand the inclined surface of the sides, said series of tubes approachingnear to each other at their upper portions and being relatively farapart at their lower portions, thereby leaving a space between them forfuel, substantially as described.

4. The combination of a boiler structure of the locomotive type, of afire-box provided with a dished crown-sheet and having the lower surfaceof its sides inclined inwardly, with a series of water-tubes within thefirebox extending betwecn and toward each other from each side thereof,said tubes beingconnected to the dished portion of the crownsheet,substantially as described.

5. The combination of a boiler of the locomotive type, a fire-box withinthe same having the lower portion of its sides inclined inwardly,water-tubes extending between the crown-sheet of the fire-box and theinclined portion of its sides, the lower portion of the sides of theboiler in the vicinity of the said fire-box being inclined inwardly andhaving an opening for the introduction and inspection of tubes, withmeans for closing the opening, substantially as described.

6. The combination of a boiler of the locomotive type, a fire-box withinthe same having the lower portion of its sides inclined inwardly,water-tubes extending between the crown-sheet of the fire-box and theinclined portion-of its sides, a mud-ring between the, lower edge of theboiler and the end of the inclined portion of the sides of the fire-box,the said ring being placed so that the tubes may be placed in positionthrough the same, with means for closing the opening through themud-ring, substantially as described.

7. The combination in a boiler structure of an external shell, afire-box therein, fire-tubes extending between the fire-box and theexternal shell and a series of water-tubes on each side of a verticalplane through the long axis of the boiler, said tubes communicating withopenings in various parts of the surface of the fire-box, said series oftubes being relatively near to one another at their upper portions andsome distance apart at their lower portions, thereby leaving a spacebetween them for fuel and free combustion of gases, substantially asdescribed.

8. The combination in a boiler structure of the locomotive type of anexternal shell, a firebox therein, fire-tubes connecting the fire-boxwith the external shell, said fire-box having its crown-sheet depressedthereby forming a reservoir for water with tubes connecting saiddepressed portion of the crown-sheet with the sides of the fire-box,substantially as described.

9. The combination in a boiler of the locomotive type of anexternaishell, a fire-box therein,fire-tubes eonneeting the fife-boxwith said shell, said fire-box ha'vin g the central portion ofits crownsheet depressed, thereby 5- bringing the same at a'lewef level than'theedges 7 thereof, and water-tubes extending" from the depressed'portionof said crown-sheet to the sides of the fire-box, ce rtai'n of saidtubes v approaching relatively near to each other at their upperportions, substantially aside 16

